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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
06/01/2011 |
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Data da última atualização: |
16/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SIDDIQUE, I.; VIEIRA, I. C. G.; SCHIMIDT, S.; LAMB, D.; CARVALHO, C. J. R. de; FIGUEIREDO, R. de O.; BLOMBERG, S.; DAVIDSON, E. A. |
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Afiliação: |
YLYAS SIDDIQUE, Universidade of Queensland; IMA CÉLIA GUIMARÃES VIEIRA, Museu Paraense Emílio Goeldi; SUSANE SCHIMIDT, University of Queesland; DAVID LAMB, University of Queensland; CLAUDIO JOSE REIS DE CARVALHO, CPATU; RICARDO DE OLIVEIRA FIGUEIREDO, CPATU; SOMON BLOMBERG, University of Quuensland; ERIC A. DAVIDSON, Woods Hole Research Center. |
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Título: |
Nitrogen and phosphorus additions negatively affect tree species diversity tropical forest regrowth trajectories. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Ecology, v. 91, n. 7, p. 2121-2131, 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Nutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addition. The resulting intensi?ed competition probably prevented an expected positive N þ P synergy in the tree assemblage. Thus, N or P enrichment may favor unknown tree functional response types, reduce the diversity of coexisting species, and delay species accrual during structurally and functionally complex tropical rainforest secondary succession. MenosNutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addit... Mostrar Tudo |
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Thesagro: |
Floresta tropical; Fósforo; Nitrogênio. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/24907/1/Nitrogen-claudio.pdf
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Marc: |
LEADER 02562naa a2200241 a 4500
001 1871754
005 2022-11-16
008 2010 bl uuuu u00u1 u #d
100 1 $aSIDDIQUE, I.
245 $aNitrogen and phosphorus additions negatively affect tree species diversity tropical forest regrowth trajectories.$h[electronic resource]
260 $c2010
520 $aNutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addition. The resulting intensi?ed competition probably prevented an expected positive N þ P synergy in the tree assemblage. Thus, N or P enrichment may favor unknown tree functional response types, reduce the diversity of coexisting species, and delay species accrual during structurally and functionally complex tropical rainforest secondary succession.
650 $aFloresta tropical
650 $aFósforo
650 $aNitrogênio
700 1 $aVIEIRA, I. C. G.
700 1 $aSCHIMIDT, S.
700 1 $aLAMB, D.
700 1 $aCARVALHO, C. J. R. de
700 1 $aFIGUEIREDO, R. de O.
700 1 $aBLOMBERG, S.
700 1 $aDAVIDSON, E. A.
773 $tEcology$gv. 91, n. 7, p. 2121-2131, 2010.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
13/12/2011 |
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Data da última atualização: |
07/03/2013 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
RIBAS, A. F.; KOBAYASHI, A. K.; PEREIRA, L. F. P.; VIEIRA, L. G. E. |
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Afiliação: |
ALESSANDRA F. RIBAS, IAPAR; ADILSON KENJI KOBAYASHI, CPAMN; LUIZ FILIPE PROTASIO PEREIRA, SAPC; LUIZ G. E. VIEIRA, IAPAR. |
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Título: |
Produção de plantas transgênicas de café resistentes ao herbicida glufosinato de amônio |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 4., 2005, Londrina. Anais... Brasília, DF: Embrapa Café, 2005. |
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Idioma: |
Português |
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Conteúdo: |
Plantas transgênicas de Coffea canephora P. resistentes ao herbicida glufosinato de amônio foram regeneradas a partir de explantes foliares cocultivados com Agrobacterium tumefaciens EHA105 contendo o plasmídio pCAMBIA3301, que contém os genes bar e uidA ambos sob controle do promotor 35S ou pIBI3 (3300 contendo o gene da ACC oxidase, antisenso) ou ainda bombardeados com o plasmídio pCAMBIA3301. Embriogênese somática direta foi induzida no meio contendo ¼ dos macros e metade dos micronutrientes do meio MS, constituintes orgânicos do meio B5 e 30 g.L 1 de sacarose, suplementado com 5mM N 6 ? (2isopentenil) adenina (2iP) e 10 mM de glufosinato de amônio para seleção de embriões transgênicos putativos. A presença e a integração do gene bar foram confirmados pelas análises de PCR e Southern blot. As plantas transgênicas pulverizadas com 1600 mg.L 1 do herbicida Finale que contém glufosinato como ingrediente ativo, não apresentaram sintomas de toxidez, mantiveram a coloração e continuaram crescendo normalmente na aclimatação ex vitro. |
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Palavras-Chave: |
Glufosinato de amônio; Tolerância a herbicida; Transformação genética. |
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Thesagro: |
Café. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/50081/1/Producao-de-plantas.pdf
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Marc: |
LEADER 01741nam a2200193 a 4500
001 1909482
005 2013-03-07
008 2005 bl uuuu u00u1 u #d
100 1 $aRIBAS, A. F.
245 $aProdução de plantas transgênicas de café resistentes ao herbicida glufosinato de amônio$h[electronic resource]
260 $aIn: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 4., 2005, Londrina. Anais... Brasília, DF: Embrapa Café$c2005
520 $aPlantas transgênicas de Coffea canephora P. resistentes ao herbicida glufosinato de amônio foram regeneradas a partir de explantes foliares cocultivados com Agrobacterium tumefaciens EHA105 contendo o plasmídio pCAMBIA3301, que contém os genes bar e uidA ambos sob controle do promotor 35S ou pIBI3 (3300 contendo o gene da ACC oxidase, antisenso) ou ainda bombardeados com o plasmídio pCAMBIA3301. Embriogênese somática direta foi induzida no meio contendo ¼ dos macros e metade dos micronutrientes do meio MS, constituintes orgânicos do meio B5 e 30 g.L 1 de sacarose, suplementado com 5mM N 6 ? (2isopentenil) adenina (2iP) e 10 mM de glufosinato de amônio para seleção de embriões transgênicos putativos. A presença e a integração do gene bar foram confirmados pelas análises de PCR e Southern blot. As plantas transgênicas pulverizadas com 1600 mg.L 1 do herbicida Finale que contém glufosinato como ingrediente ativo, não apresentaram sintomas de toxidez, mantiveram a coloração e continuaram crescendo normalmente na aclimatação ex vitro.
650 $aCafé
653 $aGlufosinato de amônio
653 $aTolerância a herbicida
653 $aTransformação genética
700 1 $aKOBAYASHI, A. K.
700 1 $aPEREIRA, L. F. P.
700 1 $aVIEIRA, L. G. E.
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Embrapa Café (CNPCa) |
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